The Logic of the Dry Beer

Joe walks into a bar. Joe's friend, Al, sits down next to him. Joe tells the bartender, “I'll take a large beer.”
The bartender says, “Do you want dry beer with no aftertaste, or brewed beer with aftertaste?”
Joe thinks about this for a minute. “Ah, give me the brewed.” So the bartender gives it to him and he chugs it.
“No, no,” says Al, “think manly! I'll have a dry beer.” The bartender goes to fix it.
“Why the dry?” Joe asks.
“Well,” says Al, “that way you can have one sip, and since it has no aftertaste, you can keep on drinking and forget you just had one!”